Motor Full-Load Current Calculator by HP
Motor full-load current by HP converts rated mechanical output into electrical input current from voltage, phase, efficiency and power factor.
motor full load current calculator by hp motor full-load current calculator by horsepower hp to amps motor
Three-phase current
I = HP * 746 / (sqrt(3) * V * PF * efficiency)
Single-phase current
I = HP * 746 / (V * PF * efficiency)
Code-table caution
Formula current can differ from nameplate FLA and code full-load-current tables. Use the applicable authority table for final conductor and protection sizing.
Related pages
- Motor full-load amps calculator - live HP, voltage, phase, efficiency and PF current screen.
- Motor overload size calculator - overload relay or heater setting context.
- Ampacity derating calculator - conductor ampacity after correction and adjustment.
- Voltage drop calculator - motor feeder voltage-drop screen.